Sheet metal fastening device



SHEET METAL FASTENING DEVICE Fil ed June 23, 1945 I mmvroxy.

- HTTOENEY H. w. KOST 1 2,404,236"

Patented July 16, 1946 Harold W.

Detroit Harvester Original application Se Divided and Kost, Birmingham,

Company, corporation of Michigan ptember 1', 1944, Serial Mich assignorto Detroit, lllich., a

this application June 23, 1945, Serial No. 601,254

3 Claims.

threaded engaging devices to cooperate with each other securely toretain the screw in place Another obJect is to produce a new and 1masupporting panel and i provided with screw-thread engaging means andalso lock nut means;

Figure 2 is a top plan View of the fastener shown on Figure 1;

Figure 3 is applied thereto.

The illustrated embodiment of the invention comprises a sheet metalfastener provided with a cup-shaped body B provided with a bottom walll2. Integrally formed in the bottom wall I2 is a nut-like screw threadengaging part l3. Tongues l4 extend upwardly from the bottom wall l2 andterminate in outwardly bent flanges l5. Struck from the side Wallsof thetongues against the under side of the panel and cooperate with theflange IS in holding the fastener in position. Manifestly this providesfor snap fastening engagement with the panel aperture.

As shown particularly on Figure 4, a pair of spaced tongues or arms Hare integral with the base or bottom wall I! and are interposed betweenthe tongues l4.

Each of the tongues I1 I 2 inclines upwardly and outwardly from thebottom wall l2 so that when the fastener is mountother in accordancewith the threads. As shown, each end portion I8 is formed with acurvilinear notch l9 in order effectively to contact the root diameterof the screw.

When a screw S fastener, it first engages the, end portions l8 tightlythe root diameter of end portions I 8 also tighten upon thescrew,eifecting a toggle-like action forcing the tongues l1 intointimate binding contact with the wall of the panel aperture. Thus thescrew S is engaged at two regions and a lock nut eflect secured, therebymilitating against the screw or fastener S comingloose.

This application constitutes a division of my co-pending applicationSerial No. 552,257, filed September 1, 1944, entitled Sheet metalfastener.

in the appended claims.

What I claim is: g l. A fastener comprising a cup-shaped body of springmetal adapted to be inserted into an aperascrew. 2. A fastenercomprising a cup-shaped body of spring metal adapted to be inserted intoan aperture in a supporting panel, an integral screw thread engagingportion deformed from the bottom wall of the body and spaced inwardlyfrom the inner side of the supporting panel, said body be inserted intoan an integral screw the botpair i thread of a screw and a cup-shapedbody 15 tom wall of the body and spaced inwardly from r the inner sideof the including two pairs of opposed integral tongues extending in thesame general direction from the bottom wall, outwardly bent flanges onone pair of tongues to engage the outer side of the supporting panel,spring fingers integral with said last tongues for snap der side of thesupporting panel, the other pair of tongues being engageable with thewalls of the panel aperture, end portions of said last tongues beingbent toward each other, and screw thread engaging surfaces on said bentendportions for cooperating with said thread engaging portion 7 forretaining the screw. 7

' HAROLD W. KOST.

upporting panel, said body engagement with the un-

